In the construction of Qinzhuo-Luwu first class highway, different blasting methods were adopted for the highway sectors with different characteristics by Guangxi corporation for civil engineering construction & mineral exploration.

Take the Longgao First class Highway as example, this paper expatiates the heavy repair course.

In order to study the prediction of operating speed on microsection for road safety evaluation,the driver s safety perception factor sets for third-class highway were determined,3-D simulation model including 15 sections was built by using MultiGen Creator software,and the virtual simulation system was developed by using Vega.

Beginning with basic data of traffic accidents in grade-I highway,analyzing the data of traffic accident of the integral subgrade and separated subgrade,it′s clear that the features of severity,time and space distribution vehicle type of the accidents in grade-I highway.

Discussion on the second-class highway design common fault

Based on the theory of the vehicle moving stability,the effects of beyond-standard second-class highway in the mountains on traffic safety are analyzed,and some improving measures of our safety guarantee engineering are proposed.

Based on the summary of the common failure of the similar bridge abutment in the second-class highway of Yongbin stage in the National Route 322,the author analyzes the concrete cause of the failure,puts forward the rational reinforcement treatment scheme,the observation proves that the treatment scheme obtains the good effect,the problems are basically solved.

A Relationship between the Construction of the Class Ⅱ Highway and Facilities along the Highway Line;